Wesafrae 6X ORP Calibration Powder Buffer Powder ORP Tester Measuring Calibration Solution 256MV

• This product is a one-time-use product and cannot be stored. It is recommended that you purchase more at one time as needed to get a greater discount.
• It is recommended to use calibration once a week

Wesafrae Instruction: 1.Add the contect of the sachet into a container with 50ml(1.69oz) of distilled water at the temperature of 25c(77f) 2.Mark the container with the ORP level powder used for reference and keep it away from children. Colour:white Material:ORP Package Contents: 6 x ORP Calibration Powder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.